Download 12/9/10 Practice Test Exam 4

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Supplemental Instruction
Iowa State University
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Cody
Biology 211 (1)
Dr. Serb
12/9/10
1. The ____ growth model takes into account density dependent factors that limit population
growth.
a. exponential
b. interspecific
c. logistic
d. intraspecific
2. Chameleons will often alter their coloration to blend in with their background. This is a
form of ___coloration.
a. Mullerian
b. Cryptic
c. Camouflaged
d. Batesian
3. The placement of the major biomes of the Earth is determined by differences in ___.
a. temperature and precipitation
b. soil and wind
c. proximity to mountain ranges or oceans
d. temperature
4. Territorial species, such as large cats (tigers, leopards), typically have a ____ dispersal
pattern.
a. random
b. harem with a lead male
c. uniform
d. clumped
5. If an each individual from a species has an equal chance of dying throughout each
individual's life span, the population has a ____ .
a. Type I survivorship curve, like humans
b. Type II survivorship curve, like squirrels
c. Type III survivorship curve, like oysters
d. Type II survivorship curve, like oysters
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6. Which of the following is a density independent limitation to population growth?
a. starvation
b. infectious disease
c. buildup of waste products
d. blizzards
7. If a population has 40% of its population over reproductive age, 35% at reproductive age,
and 25% at pre-reproductive age, it is ___.
a. rapidly increasing
b. slowly increasing
c. decreasing
d. unchanging
8. An animal's realized niche differs from its fundamental niche because ___.
a. interspecific competition limits its fundamental niche
b. intraspecific competition expands its fundamental niche
c. interspecific competition limits its niche, changing a fundamental to a realized
niche
d. intraspecific competition limits its growth
9. Commensal organism’s ____.
a. gain without helping or harming another species
b. lose nutrients to other species
c. lose nutrients due to competition
d. gain nutrients at the expense of other species
10. Male lions often compete for leadership of a pride and breeding opportunities with a
"harem" of females. This phenomena is best described as _____.
a. interspecific competition
b. commensalism
c. intraspecific competition
d. resource partitioning
11. A cluster of flowering plants is only found under shade trees. If there are 4 such trees in a
10 acre field, these flowering plants would have a ____ distribution.
a. clumped
b. uniform
c. K-selected
d. Random
12. All nonliving factors, such as temperature, light, water and nutrients are considered ____
factors influencing an environment.
a. abiotic
b. rocks
c. biotic
d. soil
13. If you place two species of bacteria that use the same food sources in a single flask, over
time one will thrive and other will die. This phenomena is common in biology and is
called ____.
a. phagocytosis
b. competitive exclusion
c. fighting till the death
d. exocytosis
14. Exponential growth models ___.
a. take into account density dependent but not density independent limitations to
population growth.
b. All of these
c. work best for dominant rather than keystone species population growth estimates.
d. None of these
e. are best used to calculate the size of territorial species ranges
15. If you remove a predator, such as a starfish, from an area, like a clam bed, and the # of
different species in the clam bed goes down, what can we say about the starfish?
a. It was a keystone predator
b. It was the dominant species
c. It is a regulator, not a conformer
d. It’s cute.
16. A populations carrying capacity
a. Can be accurately calculated using the logistic growth model.
b. Generally remains constant over time.
c. Can never be exceeded.
d. May change as environmental conditions change.
17. The feeding relationships among the species in a community determine the community’s
a. Ecological niche
b. Trophic structure
c. Species richness
d. Specie-area curve
18. Food chains are somewhat short because
a. Most of the energy in a trophic structure level is lost as it passes to the next higher
level.
b. Only a single species of herbivore feeds on each plant species.
c. Local extinction of a species causes extinction of the other species in its food
chain.
d. Predator species tend to be less diverse and less abundant than prey species.
19. Which of the following organisms is incorrectly paired with its trophic level?
a. Cyanbacterium: primary producer
b. Grasshopper: primary consumer
c. Humans: primary producer
d. Fungus: detritivore
20. Which of these ecosystems has the lowest primary production per square meter?
a. A salt marsh
b. An open ocean
c. A coral reef
d. A grassland
21. Nitrifying bacteria participate in the nitrogen cycle mainly by
a. Converting nitrogen gas to ammonia
b. Releasing ammonium from organic compounds, thus returning it to the soil.
c. Converting ammonia to nitrogen gas, which returns to the atmosphere.
d. Converting ammonium to nitrate, which plants absorb.
22. Ecologists conclude there is a biodiversity crisis because
a. Current extinction rates are very high and many species are threatened or
endangered.
b. Scientists have at last discovered and counted most Earth’s species and can now
accurately calculate the current extinction rate.
c. Many potential life-saving medicines are being lost as we evolve.
d. There are too few biodiversity hot spots.
23. The discipline that applies ecological principles to returning degraded ecosystems to
more natural states is known as
a. Landscape ecology
b. Conservation ecology
c. Restoration ecology
d. Resource conservation
24. What is the single greatest threat to biodiversity?
a. Introduced species that compete with or prey on native species.
b. Habitat alteration, fragmentation, and destruction.
c. Pollution of Earth’s air, water, and soil.
d. Disruption of trophic relationships as more and more prey species become extinct.
1. C
2. B
3. A
4. C
5. B
6. D
7. C
8. C
9. A
10. C
11. A
12. A
13. B
14. D
15. A
16. D
17. B
18. A
19. C
20. B
21. D
22. A
23. B
24. D